I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
gaiety gait gat gadi gaed gate goat catty kitty gouty quiet gutty guide gaudy gaddi gateau cattie goatee guttae caddie goodie cat gad got gut kat kit qat
moiety gaiety piety pity chitty pieta whity petty titty peaty diet nitty suety netty meaty mity laity quiet kitty jetty bitty city deity ditty whitey witty shitty